| Título: |
Use of the optical lithography in the development of disposable carbon based electrodes - doi: 10.4025/actascitechnol.v35i1.11915 |
| Autores: |
Mello, Lucilene Dornelles; Universidade Federal do Pampa Kisner, Alexandre; Universidade Estadual de Campinas Pereira, Arnaldo; Universidade Estadual de Campinas Kubota, Lauro Tatsuo; Universidade Estadual de Campinas |
| Fecha: | 2013-01-30 |
| Publicador: | Acta Scientiarum. Techonology |
| Fuente: |
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| Tipo: |
litografia |
| Tema: |
1.06.04.03-0 optical lithography; carbon-paste electrode; cyclic voltammetric Química |
| Descripción: |
In this study, carbon-based electrodes for disposable use were constructed using the technique of optical lithography. The process consisted in the irradiation of UV light on a layer of photosensitive resin (SU-8 50) deposited on a substrate of PVC. The pattern obtained electrode was filled with carbon paste. The electrodes were characterized by cyclic voltammetric using the reversible system Fe(CN)63-/Fe(CN)64- in KCl 0.1 mol L-1 and electrochemical impedance spectroscopy (EIS). The electrodes showed an E°’ = ½ (Epa + Epc) » 229 (± 2) mV vs SCE (n = 4), with DEp » 235 (± 14) mV (n = 4). Other studies showed a linear behavior of the peak current (Ip) both anode and cathode with v1/2, probably due to diffuse contribution and/or electron transfer kinetics of the reaction. These parameters are in accordance to with those obtained for screen-printed electrode described in the literature. The good results obtained show the suitability of the electrodes for analytical applications such as development of sensors. |
| Idioma: | Inglés |